Fast Object Database for Java - with JPA/JDO support

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Performance and memory usage of queries

MyEntityElement();     myEntity.getList().add(myEntityElement);    }    em.getTransaction().commit ... .getTransaction().commit();   em.close();   emf.close(); } @Entity public static class MyEntity ...     em.getTransaction().commit(); On update ObjectDB prepares all the revised pages in memory before

On ensuring ID available after persist

is persisted (i.e. before commit). This may be useful when the primary key value is needed earlier. Hoping ... postponing ID allocation to commit or flush - multiple IDs for multiple objects can be allocated ... base; if I commit to ObjectDB I can then adopt performance tuning strategies that suit it better, such as TABLE. webel Dr Darren Kelly

WebService : Failed to get reference value of field using enhanced method

: org.apache.axis2.AxisFault: Failed to commit transaction: Failed to get reference value of field field ... including nested exceptions: org.apache.axis2.AxisFault: Failed to commit transaction: Failed ... ().commit(); As attachment I uploaded a simple testcase, but you have to archive to .aar file

New to Product & Having An Issue

); em.getTransaction().commit(); }catch(Exception e){ e.printStackTrace ... (this.foundResult); em.getTransaction().commit(); }catch(Exception e){ e ... : departments) em.remove(d); em.getTransaction().commit

[ObjectDB 2.2.6_02] Unexpected exception (Error 990) at com.objectdb.o.OBC.aJ(

.getTransaction().commit(); } catch (Exception ex) { if (findMomentEntity(moment ... ); em.getTransaction().commit(); } catch (Exception ex ... .merge(chart); em.getTransaction().commit(); } catch (Exception ex

Attempt to remove a detached entity object (error 613)

to merge it ... Unfortunatly, i get this error : Failed to commit transaction: Attempt to remove a detached entity object (error 613) at com.objectdb.jpa.EMImpl.commit( We see in this stack trace that is a commit operation, all right ... So why does it try to remove the object

Cannot save or update entity on Spring App

().begin(); em.persist(guest); em.getTransaction().commit(); em ... ().commit(); em.flush(); em.clear(); em.close(); return guest ... )); boolean que = q.executeUpdate() > 0; em.getTransaction().commit(); em.clear

Error 363 - Failed to read value of inverse relationship

.enterprise.transaction.JavaEETransactionImpl.commit( at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.commit( ... .persist(obj);             tr.commit();         } catch (Exception ex) {             ex

Problem with bidirectional link

to commit transaction: Attempt to persist a reference to a non managed Folder instance - field Folder.children (error 613) at com.objectdb.jpa.EMImpl.commit( at F380.main( ... ( at com.objectdb.o.OBM.bF( at com.objectdb.jpa.EMImpl.commit(EMImpl

NullPointer when accessing entity field

while the EntityManager is manipulated concurrently in another thread (e.g. transaction is committed or ... transaction (if not exists), do the operations using EM in ThreadLocal, on batch end we commit transaction ... ... Regarding the batch operations, where we usually do update on many objects and after that commit

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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